Inter web-app communication

How can I make 2 web-apps communicate with each other? I want to develop a basic prototype with following requirements: - provide a link in web app1 - On clicking that link, it should open say 'welcome.jsp' from another web-app2.

thank you! I didn't know it is this simple. I have another request: I am able to open the new page in new window but I do not want the navigation bar in there. Is there a way to avoid the navigation bar and have a basic window with just "Minimize", "Maximize" and "Close" buttons?

Eric, is correct. Rather than using the target attribute, have the link execute a JavaScript function that calls window.open(). The 3rd parameter to window.open() allows you to customize the window chrome.